Journal ArticleDOI
Generation of felsic crust in the Archean: A geodynamic modeling perspective
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In this article, a 2D coupled petrological-thermomechanical tectono-magmatic numerical model with initial conditions appropriate to the Eoarchean-Meso-Archean was used to evaluate hypotheses of Archean crust formation.About:
This article is published in Precambrian Research.The article was published on 2015-12-01. It has received 210 citations till now. The article focuses on the topics: Continental crust & Adakite.read more
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Secular change in metamorphism and the onset of global plate tectonics
Michael Brown,Tim E. Johnson +1 more
TL;DR: In this article, thermal gradients of metamorphic rocks were analyzed for 456 localities from the Eoarchean to Cenozoic Eras to test the null hypothesis that thermal gradient through time did not vary outside of the range expected for each of these distinct plate tectonic settings.
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Stagnant lids and mantle overturns: Implications for Archaean tectonics, magmagenesis, crustal growth, mantle evolution, and the start of plate tectonics
TL;DR: The lower plate is the dominant agent in modern convergent margins characterized by active subduction, as negatively buoyant oceanic lithosphere sinks into the asthenosphere under its own weight as discussed by the authors.
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Earth's first stable continents did not form by subduction
TL;DR: This protracted, multistage process for the production and stabilization of the first continents—coupled with the high geothermal gradients—is incompatible with modern-style plate tectonics, and favours instead the formation of TTGs near the base of thick, plateau-like basaltic crust.
Earth's first stable continents did not form by subduction
TL;DR: Johnson et al. as discussed by the authors performed phase equilibria modelling of the Coucal basalts from Western Australia and confirmed their suitability as parent rocks of the early continental crust of the Earth's first continents.
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Archaean tectonic systems: A view from igneous rocks
TL;DR: In this paper, the authors examine the global distribution of Archaean and modern igneous rock's compositions, without relying on preconceptions about the link between rock compositions and tectonic sites.
References
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Journal ArticleDOI
An overview of adakite, tonalite–trondhjemite–granodiorite (TTG), and sanukitoid: relationships and some implications for crustal evolution
TL;DR: In this article, an analysis of an extensive adakite geochemical database identifies two distinct compositional groups: high-SiO2 adakites (HSA) which represent subducted basaltic slab-melts that have reacted with peridotite during ascent through mantle wedge and low-Si O 2 adakitic mantle wedge.
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Experimentally based water budgets for dehydrating slabs and consequences for arc magma generation
Max W. Schmidt,Stefano Poli +1 more
TL;DR: In this article, phase diagrams of hydrous mid-ocean ridge (MOR) basalts to 330 km depth and hydrous peridotites to 250 km depth are compiled for conditions characteristic for subduction zones.
Book
Rheology of the earth
TL;DR: In this article, the authors introduce the Continuum Approach to Earth Rheology from microphysics, which is based on the atomic basis of deformation, elasticity, strength, failure and plasticity.
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Partial melting of amphibolite/eclogite and the origin of Archean trondhjemites and tonalites
TL;DR: In this article, a series of vapor-absent (i.e., Pfluid < Ptotal) melting experiments on four natural basaltic compositions were conducted at 8, 16, 22 and 32 kbar in order to assess the validity of models for the origin of Archean granitoids which assume a mafic crustal source.
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Generation of sodium-rich magmas from newly underplated basaltic crust
Michael P. Atherton,Nick Petford +1 more
TL;DR: In this article, the Cordillera Blanca complex in Peru is described, which has characteristics of the high-Al TTD suite but which were produced above a subduction zone containing a 60-Myr-old slab.